How do I know if my iphone has successfully been backed up to my iTunes? I plugged it in and it said it backed up and I did a sync, but when I am looking through the summary page and I am not sure that all of my data got backed up. Please help!!

Question

I have never backed up my iphone to my itunes because I always used the cloud. However, a few months ago, my wifi disk in my phone burned out so the Apple Store told me to back up everything to my itunes. I am going today to get the iphone 6 so I connected my phone (iphone 4S) to my itunes and I backed up and synced. However, when I look throughout the summary page and click in different areas (Photos, Movies), I don't see any of my data -- it is still asking me to Sync from iPhoto or to sync from another location. By backing up & syncing my phone, did all of my data get saved? Or do I still need to do more steps?
Sorry for the long winded question, I am just so nervous to get a new phone and plug it in to be restored and not have any of my pictures, videos or contacts, etc. Any help would be so so appreciated!

Answer 1

Thank you again for all of your help!! I really appreciate it!
I think I am following -- I was able to upload to my iPhoto and all photos and videos are there that is a plus! I tried to create an Event in my iPhoto and put all of my photos in that event but for some reason, now my iTunes it not recognizing that Event in my iPhoto. It is not allowing me to import just that event at the moment but I may be doing something wrong. At least all of my pics and vids are in iPhoto so that is a plus and I know they are at least saved somewhere. Just for some reason, my iTunes it not locating the event that I created with only those photos.
Thank you for letting me know about my contacts! How do I know if I have the contacts app?
Also, I had no clue that my iCloud could be backed up via cellular data! However, is this a new feature with the most updated iOS?? Unforutnatly I am like 2 iOS updates behind because I don't have enough storage on my phone. I still get the notification that my phone needs to be plugged in and connected to wifi in order to back up to the cloud :-(
How can I sync using USB? Right now when i click on the info tab for my iPhone in my iTunes this is the answer that I get -- I am a little unclear as to what it means.
Sync Contacts:
Your contacts are being synced with you iPhone over the air from iCloud. Over-the-air sync settings can be changed on you iPhone
Sync Calendars:
Your calendars are being synced with you iPhone over the air from iCloud. Over-the-air sync settings can be changed on you iPhone